<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
  <style>
    #zxy{
      color: green;
    }
    .a{
      color: blue;
    }
    h1,h2{background: yellow}
    input[type="submit"]{background: red}
    input[type="button"]{color: pink}
    *{
      border: 1px solid red;
    }
  </style>
</head>
<body>
<ul>
  <li id="zxy">张学友</li><li class="a">刘德华</li><li>郭富城</li>
</ul>
<h1 class="a">悟空</h1><h1>八戒</h1><h1>唐僧</h1>
<h2>刘备</h2>
<input type="submit">
<input type="button" value="按钮">
</body>
</html>